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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 27 July 2022, Shift 2, Physics Q49

Question 49 of 90 in this shift, Physics question 19 of 30, Section A.

For a constant collector-emitter voltage of 8 V, the collector current of a transistor reached to the value of 6 mA from 4 mA, whereas base current changed from 20 μ\muA to 25 μ\muA value. If transistor is in active state, small signal current gain (current amplification factor) will be :
  1. (1)240
  2. (2)400Official answer
  3. (3)0.0025
  4. (4)200

Official answer

Option 2

NTA final key.

Chapter
Semiconductor Electronics: Materials, Devices and Simple Circuits
Topic
Transistors
Idea tested
AC vs DC Current Gain

Same idea in other shifts

Asked 2× in all
  1. 6 Sep 2020, Shift 2 · Q25The output characteristics of a transistor is shown in the figure. When VCEV_{CE} is 10 V and IC=4.0I_C = 4.0 mA, then value of βac\beta_{ac} is…MediumNumerical valueHas a figure

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.